diff --git a/doc/DoxygenLayout.xml b/doc/DoxygenLayout.xml
--- a/doc/DoxygenLayout.xml
+++ b/doc/DoxygenLayout.xml
@@ -2,24 +2,24 @@
   <!-- Navigation index tabs for HTML output -->
   <navindex>
     <tab type="mainpage" visible="yes" title=""/>
-    <tab type="modules" visible="yes" title=""/>
+    <tab type="modules" visible="yes" title="" intro=""/>
     <tab type="classes" visible="yes" title="">
-      <tab type="classes" visible="yes" title=""/>
-      <tab type="classindex" visible="$ALPHABETICAL_INDEX" title=""/> 
-      <tab type="hierarchy" visible="yes" title=""/>
-      <tab type="classmembers" visible="yes" title=""/>
+      <tab type="classes" visible="yes" title="" intro=""/>
+      <tab type="classindex" visible="$ALPHABETICAL_INDEX" title=""/>
+      <tab type="hierarchy" visible="yes" title="" intro=""/>
+      <tab type="classmembers" visible="yes" title="" intro=""/>
     </tab>
     <tab type="namespaces" visible="yes" title="">
-      <tab type="namespaces" visible="yes" title=""/>
-      <tab type="namespacemembers" visible="yes" title=""/>
+      <tab type="namespaces" visible="yes" title="" intro=""/>
+      <tab type="namespacemembers" visible="yes" title="" intro=""/>
     </tab>
     <tab type="files" visible="yes" title="">
-      <tab type="files" visible="yes" title=""/>
-      <tab type="globals" visible="yes" title=""/>
+      <tab type="files" visible="yes" title="" intro=""/>
+      <tab type="globals" visible="yes" title="" intro=""/>
     </tab>
-    <tab type="dirs" visible="yes" title=""/>
-    <tab type="examples" visible="yes" title=""/>  
-    <tab type="pages" visible="yes" title=""/>
+    <tab type="dirs" visible="yes" title="" intro=""/>
+    <tab type="examples" visible="yes" title="" intro=""/>
+    <tab type="pages" visible="yes" title="" intro=""/>
   </navindex>
 
   <!-- Layout definition for a class page -->